Meat chopper and method of making same



Apr. 17, 1923. 1,451,891

T. F. RATAICZAIK MEAT CHOPPER AND METHOD OF MAKING SAME Filed Feb. 20,1922 g M meat is forced through nun STATES PATENT orncr.

. z. I. RATAIGZAK, O1 TROY, OHIO, ASSIGNOB TO THE HOBART MANUFACTURINGcomm, F TROY, OHIO, A @OBPOBATION Q! OHIU.

m'r CHOPPER AND KETHODOF MAKING SAME.

Application fled l'ebruary 20, 1922. Serial No. 53?,777.

w aocomnying drawings, forming part of this specification.

My invention relates to the type of meat choppers comprising a casing, afeed worm, a perforated plate and a knife, in which the the perforatedplate by the feed screw'while the knife, mounted on the stud supportingthe outer end of the feed screw revolving with the screw againsttheinner face of the perforated w plate, cuts the meat as it is forcedthrough the perforations.

v The supporting stud is scrcwthreaded unto a threaded socket in the endof the feed screw and is formed with a squared portion to hold theknife. The rams to which the stud is subjected are frequently verysevere, resulti in a stripping of the threads on the stu or worm, an atthe same time it is extremely desirable to manufacture the squaredportion of the stud from material which is extremely tough and hard andwhich cannot be readily threaded.

it is the object of my invention to provide a chea and effective methodof manufacturing the stud which shall obviate the diflicultics above setforth, and it consists of that certain novel construction and arran'emcnt of parts to be hereafter partic arly inted out and claimed.

in the .1 rawings,

Figure 1 is an enlarged side elevation of the stud partly in section.

h a re 2 is central longitudinal section of thc'meat chopper complete.

The meat chopper as a whole is of an old and well known construction, inwhich 1 is the wsing, with a hopper 2, feed screw 3 and perforated plate4, with a hub 5 forming a w or the stud 6, which is screw into tothreaded socket in the one d of the feed screw, while the other end ishe .t to the operating shaft 7 journaled in the hub 8 of the casing. Theperforated W platiaheldinintheendofthe by the tightening cap 13 and iscasing locke against rotation by -a king pin 9 inserted through a boss10 on the casing and engaging a notch 12 in the edge of the perforated"late. The stud 6 is formed with a squar portion 14: upon which ismounted the knife 15.

As stated above, it is desirable to manufacture this portion of the studout of tough and hard material, so hard as to render it diflicult andexpensive to cut threads for the attachment to'the feed screw. Moreoverit IS desirable for the square stud to have the maximum torsionalstrenah Which can be secured. This latter can st be secured by using aforged or drawn bar of the required size. Furthermore it is verydesirable that the strength of the threads on the threaded portion ofthe stud and its rmeiving socket shall be as great as possible. This canbest be accomplished by making the diameter of the threaded portion asgreat as possible. I therefore provide the squared inner end of the studwith a comparatively soft metal portion 16. This soft metal portion isformed with a socket to receive the squared end of the stud and ispressed and shrunk in place while the screw threads 17 for attachment tothe feed screw are cut on this soft metal portion. 7

In this way if the knife is subjected to unusual strains while in usethere is little danger of the threads in the feed screw bcing dama ed orstripped and should the square stu be damaged the soft metal rtion isreadily removable from the cod screw to permit of'replacement.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is 1 1. In a meat chopper, a stud for thefeeding and cutting devices, comprising a hard and tough metal portionfor the journal bearing and knife mounting parts, and a comparativelysoft metal portion for securing the stud to the feeding device.

2. In a meat chopper, a stud for the feeding and cutting devices,comprising a hard and tough metal portion for the journal bearing andlmife mounting parts, and a comparatively soft metal portion forsecuring the stud to the feeding device, the soft metal portion beingshrunk around the hard metal portion.

3. In a meat chopper, a stud for the feeding and cutting devices,comprising a. hard devices which consists in forging from hard 10 andtough metal portion for the journal and tough 'metalthe bearing andsquared bearing and knife mounting parts, and a portions and then inshrinking over the end comparatively soft metal threaded portion of thesquared portion a comparatively soft for securing the stud to thefeeding device, metal portion and then cutting SCI'GWH the soft metalthreaded portion being shrunk threads in the soft metal for securing tothe 15 around the hard metal portion. feeding devices. P

4. In a meat chopper, the method of forming studs for the feeding andcutting THOMAS F. RATAICZAK

